To initiate a Manual Pixel Refresh on your OLED LG, go to Settings -> Picture -> OLED Panel Setting -> Pixel Refresher. This works by scrolling a horizontal bar down the screen and this process can help to fix any horizontal lines you might see. Modern LG OLED TVs run a scheduled pixel refresh at regular intervals to prevent image retention and stuck pixels. You can also plug your TV into another wall socket, preferably one located on the other side of the room from the current socket, again without any surge protectors or consumer extension cords that you might be using.Ĥ.

If you don’t have a wall socket testing rig, then just unplug your TV, remove any surge protectors and try another appliance that you know draws a similar current. The most common cause of low voltage from wall sockets are faulty surge protectors. If your TV is on, then you know that your wall socket is suppplying power, but the question is whether this is constant without fluctuations and is of a sufficient voltage.

Confirm Your Wall Socket is Properly Supplying Powerīecause flat screen TV’s rely on a constant power supply, when there are fluctuations in voltage these can show up as inconsistencies with the backlight, causing dark areas on your TV. If the lines have gone, then try re-seating your HDMI and other cables one by one, until you find the damaged cable that needs replacing.ģ. If they are, this means that your external connections are fine and the problem is located within the hardware of your TV. Pull up the on-screen menu to see if the horizontal lines are still there. When you turn your TV on, this means the screen will be black as it is not receiving any picture, potentially making it tough to see any horizontal lines. You can also try removing all external devices, including those connected by Bluetooth and any coaxial or signal cables, so that the TV only has a power cable going into it.

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